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Type	Originator	Title	Date
	Baker,E.A	Caving	1932
	Vakil,K.H	Rock cut temples Around Bombay	1932
	Smithsonian Institution	The Ancient Caves of Szechwan Province, China	1932
	Balch,H.E	The Mendip caves	1932
	Brown,G. B	The art of the cave dweller	1932